摘要
随着GNSS星座的增多以及多频技术的发展,基于解分离的高级接收机自主完好性监测算法被广泛研究。本文介绍了该算法的基本原理,并结合多星座特点,对中国区域内ARAIM算法能力进行评估,利用仿真数据分析了用户测距精度对算法可用性的影响;探讨了不同星座数据在中国区域的完好性性能。仿真结果表明:双频条件下,系统完好性性能很大程度上取决于用户测距精度,在中国区域内,仅GPS单星座不足以满足LPV-200进近对完好性的要求,GPS与Galileo双星座下,ARAIM算法覆盖率可达100%.
With the development of GNSS constellation and multi-frequency technol-ogy .Advanced Receiver Autonomous Integrity Monitoring （ARAIM ） approach has been widely studied ,which is an optimization of the Multiple Hypotheses Solution Separation （M HSS） method .In this study ,the basic principles of ARAIM approach are introduced , combined with multi-constellation characteristics ,the current capability of the ARAIM ap-proach in China is investigated under different constellations .The results show that under the dual-frequency conditions , the system integrity largely depends on the user accuracy （URA） .The current GPS constellation alone does not fulfil LPV-200 requirements in Chi-na .However ,using GPS and Galileo improves availably of ARAIM and its integrity per-formance ,the coverage of ARAIM is 100% .
出处
《全球定位系统》
2014年第5期32-36,共5页
Gnss World of China
